/* =========================================================
   koelimaya.com — Personal Web Developer Landing Page
   Mobile-first, Light Mode
========================================================= */

/* ---------- 1. Design tokens ---------- */
:root {
  /* Colors — Light mode base */
  --bg-primary: #ffffff;
  --bg-secondary: #f6f7f9;
  --bg-elevated: #eef0f3;
  --bg-card: #ffffff;
  --border-color: #e3e5e9;

  /* Text */
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-muted: #8b8b93;

  /* Accent — muted indigo + teal */
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-secondary: #0d9488;
  --accent-glow: rgba(79, 70, 229, 0.14);

  /* Gradient */
  --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);

  /* Spacing / layout */
  --container-max: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --section-padding: 4.5rem 0;

  /* Typography */
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Space Grotesk', 'Inter', system-ui, sans-serif;

  /* Motion */
  --transition: 0.25s ease;

  /* Glassmorphism */
  --bg-glass: rgba(255, 255, 255, 0.65);
  --bg-navbar: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] {
  --bg-primary: #0e1015;
  --bg-secondary: #14171d;
  --bg-elevated: #1b1e26;
  --bg-card: #181b22;
  --border-color: #2a2d37;

  --text-primary: #f2f2f4;
  --text-secondary: #a6a7b0;
  --text-muted: #75767f;

  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-secondary: #2dd4bf;
  --accent-glow: rgba(129, 140, 248, 0.25);

  --bg-glass: rgba(24, 27, 34, 0.65);
  --bg-navbar: rgba(14, 16, 21, 0.8);
}

/* ---------- 2. Reset ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea {
  font-family: inherit;
  font-size: 1rem;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.text-accent { color: var(--accent); }

.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 3. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.btn--primary {
  background: var(--gradient-accent);
  color: #ffffff;
  box-shadow: 0 0 0 0 var(--accent-glow);
}

.btn--primary:hover {
  transform: translate(var(--mx, 0px), calc(-2px + var(--my, 0px)));
  box-shadow: 0 10px 30px -8px var(--accent-glow);
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translate(var(--mx, 0px), calc(-2px + var(--my, 0px)));
}

.btn--sm { padding: 0.6rem 1.15rem; font-size: 0.85rem; }
.btn--block { width: 100%; }

/* ---------- 4. Navbar ---------- */
.navbar {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  background: var(--bg-navbar);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.navbar__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(var(--progress, 0));
  transform-origin: left;
  will-change: transform;
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.navbar__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-heading);
  font-size: clamp(1rem, 3vw, 1.25rem);
  font-weight: 700;
  white-space: nowrap;
}

.navbar__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9em;
  height: 1.9em;
  border-radius: var(--radius-sm);
  background: var(--gradient-accent);
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95em;
  line-height: 1;
  box-shadow: 0 6px 16px -6px var(--accent-glow);
}

.navbar__nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

.navbar__link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.navbar__link:hover,
.navbar__link.is-active {
  color: var(--text-primary);
}

.navbar__cta { display: none; }

.navbar__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
}

.navbar__toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.navbar__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.navbar__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.navbar__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle__icon {
  position: absolute;
  width: 18px;
  height: 18px;
  opacity: 0;
  transform: scale(0.5) rotate(-90deg);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.theme-toggle__icon--moon {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

[data-theme="dark"] .theme-toggle__icon--moon {
  opacity: 0;
  transform: scale(0.5) rotate(90deg);
}

[data-theme="dark"] .theme-toggle__icon--sun {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

.navbar__nav.is-open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 68px;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem;
  gap: 1.1rem;
}

/* ---------- 5. Hero ---------- */
.hero {
  position: relative;
  padding: 8.5rem 0 5rem;
  overflow: hidden;
}

.hero__inner {
  display: flex;
  flex-direction: column-reverse;
  gap: 2.5rem;
}

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.hero__title {
  font-size: clamp(2rem, 8vw, 3rem);
  margin-bottom: 1rem;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  min-height: 1.6em;
}

.js-typing::after {
  content: '';
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  margin-left: 3px;
  vertical-align: -0.15em;
  animation: blink 0.9s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero__desc {
  color: var(--text-secondary);
  max-width: 46ch;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
}

.hero__blob {
  position: absolute;
  width: 260px;
  height: 260px;
  background: var(--gradient-accent);
  filter: blur(70px);
  opacity: 0.22;
  border-radius: 50%;
}

.hero__avatar { position: relative; z-index: 1; }

.hero__avatar-img {
  display: block;
  width: min(320px, 72vw);
  height: auto;
  transform: translate(30px, -30px);
  opacity: 0.9;
}

.hero__badge {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-family: monospace;
  font-size: 0.8rem;
  color: var(--accent);
  animation: float 4s ease-in-out infinite;
}

.hero__badge--1 { top: 5%; right: 8%; }
.hero__badge--2 { bottom: 10%; left: 5%; animation-delay: 1.5s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero__scroll {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 2px solid var(--border-color);
  border-radius: 20px;
  display: none;
}

.hero__scroll span {
  display: block;
  width: 4px;
  height: 8px;
  margin: 6px auto;
  background: var(--accent);
  border-radius: 2px;
  animation: scrollDown 1.6s ease infinite;
}

@keyframes scrollDown {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(14px); opacity: 0; }
}

/* ---------- 6. Section shared ---------- */
section { padding: var(--section-padding); scroll-margin-top: 68px; }

.section-eyebrow {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--text-secondary);
  max-width: 60ch;
  margin-bottom: 2.5rem;
}

.about { background: var(--bg-secondary); }

/* ---------- 7. About ---------- */
.about__grid {
  display: grid;
  gap: 2.5rem;
}

.about__text p {
  color: var(--text-secondary);
  margin-bottom: 1.1rem;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.stat-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  padding: 1.1rem 0.5rem;
  text-align: center;
}

.stat-card__number {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-card__label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.about__highlights {
  display: grid;
  gap: 1rem;
}

.highlight-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border-color var(--transition), transform var(--transition);
}

.highlight-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.highlight-card__icon { font-size: 1.5rem; }

.highlight-card h3 { font-size: 1.05rem; margin: 0.6rem 0 0.35rem; }

.highlight-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* ---------- 8. Skills ---------- */
.skills__category { margin-bottom: 2.25rem; }

.skills__category-title {
  font-size: 1rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.skill-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-weight: 500;
  font-size: 0.9rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.skill-card:hover {
  transform: perspective(700px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 12px 30px -14px var(--accent-glow);
}

.skill-card i { font-size: 1.6rem; }

/* ---------- 9. Projects ---------- */
.projects { background: var(--bg-secondary); }

.projects__grid {
  display: grid;
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), opacity 0.2s ease;
}

.project-card:hover {
  transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 20px 40px -20px var(--accent-glow);
}

.project-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.project-card.is-hiding {
  opacity: 0;
  transform: scale(0.92);
  pointer-events: none;
}

.project-card__thumb {
  height: 170px;
  background: var(--bg-elevated);
  position: relative;
}

.project-card__thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.55;
}

.project-card__thumb--1::after { background: radial-gradient(circle at 30% 30%, var(--accent), transparent 60%); }
.project-card__thumb--2::after { background: radial-gradient(circle at 70% 40%, var(--accent-secondary), transparent 60%); }
.project-card__thumb--3::after { background: radial-gradient(circle at 40% 70%, var(--accent), transparent 60%); }
.project-card__thumb--4::after { background: radial-gradient(circle at 60% 30%, var(--accent-secondary), transparent 60%); }

.project-card__body { padding: 1.5rem; }

.project-card__title { font-size: 1.1rem; margin-bottom: 0.5rem; }

.project-card__desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.1rem;
}

.tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.3rem 0.65rem;
  border-radius: 20px;
}

.project-card__links {
  display: flex;
  gap: 1.25rem;
}

.project-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}

.project-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- 10. Contact ---------- */
.contact__grid {
  display: grid;
  gap: 2rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.form-field { display: flex; flex-direction: column; gap: 0.4rem; }

.form-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-field input,
.form-field textarea {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  color: var(--text-primary);
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-muted); }

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-field label span#captchaQuestion {
  color: var(--accent);
  font-weight: 700;
}

.captcha {
  display: flex;
  gap: 0.6rem;
}

.captcha input {
  flex: 1;
}

.captcha__refresh {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  font-size: 1.15rem;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), color var(--transition), border-color var(--transition);
}

.captcha__refresh:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: rotate(90deg);
}

.form-field--error input {
  border-color: #dc2626;
}

.form-field--honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.contact-form__status {
  font-size: 0.85rem;
  min-height: 1.2em;
  color: var(--accent);
}

.contact-info__lead {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.social-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
  font-weight: 500;
  font-size: 0.9rem;
  transition: transform var(--transition), border-color var(--transition);
}

.social-link:hover {
  transform: translateX(4px);
  border-color: var(--accent);
  color: var(--accent);
}

.social-link i { font-size: 1.3rem; }

.social-link__icon { width: 20px; height: 20px; }

/* ---------- 11. Footer ---------- */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.footer__copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- 12. Scroll-reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: calc(var(--reveal-index, 0) * 70ms);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 13. Animated background decor ---------- */
.bg-decor {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.bg-decor__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.25;
  animation: drift 20s ease-in-out infinite alternate;
}

.bg-decor__blob--1 {
  top: -10%;
  left: -5%;
  width: 380px;
  height: 380px;
  background: var(--accent);
  animation-delay: 0s;
}

.bg-decor__blob--2 {
  top: 30%;
  right: -10%;
  width: 340px;
  height: 340px;
  background: var(--accent-secondary);
  animation-duration: 24s;
  animation-delay: -6s;
}

.bg-decor__blob--3 {
  bottom: -12%;
  left: 20%;
  width: 300px;
  height: 300px;
  background: var(--accent);
  animation-duration: 18s;
  animation-delay: -12s;
}

@keyframes drift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.15); }
}

/* ---------- 14. Project filter bar ---------- */
.projects__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.75rem;
}

.filter-btn {
  padding: 0.5rem 1.1rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filter-btn.is-active {
  background: var(--gradient-accent);
  border-color: transparent;
  color: #ffffff;
}

/* ---------- 15. Project detail modal ---------- */
.project-modal {
  width: min(560px, 90vw);
  max-height: 85vh;
  overflow-y: auto;
  border: none;
  border-radius: var(--radius-lg);
  padding: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transform: scale(0.95) translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.project-modal.is-open {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.project-modal::backdrop {
  background: rgba(15, 15, 20, 0.5);
  backdrop-filter: blur(4px);
}

.project-modal__close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-secondary);
  transition: color var(--transition), border-color var(--transition);
}

.project-modal__close:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.project-modal__thumb {
  height: 200px;
  background: var(--bg-elevated);
  position: relative;
}

.project-modal__thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.55;
  background: radial-gradient(circle at 40% 35%, var(--accent), transparent 60%);
}

.project-modal__thumb--1::after { background: radial-gradient(circle at 30% 30%, var(--accent), transparent 60%); }
.project-modal__thumb--2::after { background: radial-gradient(circle at 70% 40%, var(--accent-secondary), transparent 60%); }
.project-modal__thumb--3::after { background: radial-gradient(circle at 40% 70%, var(--accent), transparent 60%); }
.project-modal__thumb--4::after { background: radial-gradient(circle at 60% 30%, var(--accent-secondary), transparent 60%); }

.project-modal__body { padding: 1.75rem; }

.project-modal__title { font-size: 1.3rem; margin-bottom: 0.75rem; }

.project-modal__desc {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.project-modal__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.project-modal__links {
  display: flex;
  gap: 1.5rem;
}

/* ---------- 16. WhatsApp floating widget ---------- */
.whatsapp-widget {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25d366;
  color: #ffffff;
  box-shadow: 0 10px 25px -8px rgba(37, 211, 102, 0.6);
  transition: transform var(--transition), box-shadow var(--transition);
}

.whatsapp-widget:hover {
  transform: scale(1.08);
  box-shadow: 0 14px 30px -8px rgba(37, 211, 102, 0.75);
}

.whatsapp-widget__icon {
  width: 28px;
  height: 28px;
}

.whatsapp-widget__ping {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #25d366;
  opacity: 0.6;
  animation: whatsapp-ping 2.2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes whatsapp-ping {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(1.9); opacity: 0; }
}

/* =========================================================
   Breakpoints — mobile-first progressive enhancement
========================================================= */

/* Tablet ≥ 640px */
@media (min-width: 640px) {
  .about__stats { grid-template-columns: repeat(3, 1fr); }
  .skills__grid { grid-template-columns: repeat(3, 1fr); }
  .projects__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { flex-direction: row; justify-content: space-between; }
}

/* Tablet ≥ 768px */
@media (min-width: 768px) {
  :root { --section-padding: 6rem 0; }

  .navbar__nav { display: flex; }
  .navbar__cta { display: inline-flex; }
  .navbar__toggle { display: none; }

  .hero { padding-top: 10rem; }
  .hero__scroll { display: block; }

  .about__grid { grid-template-columns: 1.1fr 0.9fr; align-items: start; }

  .contact-form { padding: 2.25rem; }
}

/* Desktop ≥ 1024px */
@media (min-width: 1024px) {
  .hero__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .hero__content { flex: 1; max-width: 560px; }
  .hero__media { flex: 1; min-height: 420px; }
  .hero__blob { width: 380px; height: 380px; }
  .hero__avatar-img { width: 420px; }
  .hero__avatar-initials { font-size: 4rem; }

  .skills__grid { grid-template-columns: repeat(5, 1fr); }
  .projects__grid { grid-template-columns: repeat(2, 1fr); }
  .contact__grid { grid-template-columns: 1.3fr 0.7fr; }
}

@media (min-width: 1280px) {
  .projects__grid { grid-template-columns: repeat(2, 1fr); }
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}